Hakan is a common Turkish forename, based on the Turkish language variant of the imperial title Khagan. The name is also spelled Khakan or Khaqan in other parts of the world, with the same etymology.
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6f27ecbc0dd505329a3318e0a714dcf431d3582b82644bcee7d92a39e8a895. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87eb22dd-a067-472b-bea3-0ac9bca24af8.json and https://artists.proofprofile.net/proofs/artist/87eb22dd-a067-472b-bea3-0ac9bca24af8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).